WTS Call of Duty 4: Modern Warfare Retail CD-KEY

My own key from 2008 when the game was released , can't really take any screenshots since the box broke some time ago. Nobody except me ever had access to the key so it's 100% safe. Buyout price is $13 , PM me if interested , you are going first, unless you are a highly trusted and respect member of the Sythe community. Thanks!